Civil Engineering - Strength of Materials

26. 

The maximum twisting moment a shaft can resist, is the product of the permissible shear stress and

A. moment of inertia
B. polar moment of inertia
C. polar modulus
D. modulus of rigidly.

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

27. 

For a simply supported beam with a central load, the bending moment is

A. least at the centre
B. least at the supports
C. maximum at the supports
D. maximum at the centre.

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

28. 

For a given material Young's modulus is 200 GN/m2 and modulus of rigidity is 80 GN/m2. The value of Poisson's ratio is

A. 0.15
B. 0.20
C. 0.25
D. 0.30
E. 0.40

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

29. 

The ratio of the moment of inertia of a circular plate and that of a square plate for equal depth, is

A. less than one
B. equal to one
C. more than one
D. equal to 3π/16
E. none of these.

Answer: Option D

Explanation:

For circular plate, MI = π*d^4/64.

For square plate, MI = d^4/12.

So, Ratio = MI of circular plate/MI of square plate.

= 3*π/16.


30. 

The force in member U2L2 of the truss shown in below figure, is

A. 10 T tension
B. 10 T compression
C. zero
D. 15 T compression.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.